Anterior transposition of the inferior oblique for dissociated vertical deviation with inferior oblique overaction.

We reviewed the charts of 17 children (27 eyes) who underwent anterior transposition of the inferior oblique muscle for dissociated vertical deviation coexistent with inferior oblique overaction. All the eyes showed an improvement in the inferior oblique overaction. Twenty-one eyes had reduction in the dissociated vertical deviation, five eyes showed no change in the degree of dissociated vertical deviation, and in one case the hyperdeviation increased after surgery. No intraoperative or late postoperative complications were noted. Anterior transposition is an effective procedure for weakening inferior oblique overaction coexistent with dissociated vertical deviation.